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Which process is part of the mechanism that controls muscle contraction?A. Troponin enables actin heads to attach to ATP and slide along myosinB. Myosin heads attach to troponin and tropomyosin pulls on actin filaments.C. Tropomyosin attaches to calcium and breaks the bond between actin and myosinD. Calcium frees actin filaments for myosin heads to attach
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